--- Comment #1 from V Stuart Foote <[hidden email]> ---
The Custom color is written to user profile, i.e. registrymodifications.xcu, so
trivial to directly edit with text editor without overhead of a GUI tool.
While improved GUI workflow for creation of custom colors is open as bug 124418
against the Color Picker widget. So modifications (including color name
changes) while working in the custom or applied palettes would be simplified